第二单元 第二章 第一节 细胞通过分裂产生新细胞 Flashcards

1
Q

植物细胞分裂过程

A

1 个细胞→细胞核 核分裂→细胞 质分裂→形成新的细胞 膜→形成新的细胞壁 壁→2 个细胞

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2
Q

动物细胞分裂过程

A

1 个细胞→细胞核 核分裂→细胞 质分裂→细胞 膜向内凹陷→缢裂成两个细胞

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3
Q

分裂过程中变化最明显的是?

A

染色体

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4
Q

分裂过程中染色体是如何变化的?

A

先复制加倍,后平均分配到两个细胞,保证新细胞和原细胞的遗传物质一致(染色体的数目不变,形态结构不变)。

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5
Q

生物体由小长大的原因

A

细胞的分裂、生长和分化

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6
Q

细胞生长是指?

A

细胞体积增大

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7
Q

细胞分裂是指?

A

细胞数量增加

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8
Q

细胞分化是指?

A

细胞形态、结构、功能发生变化,最终结果是形成组织。

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